William J. Sowerby (born September 16, 1956) is an American politician from Michigan. Sowerby was Democratic member of Michigan House of Representatives from District 31.
On September 16, 1956, Sowerby was born. Sowerby grew up in St. Clair Shores, Michigan.
In 1978, Sowerby earned a BA degree from Wayne State University.
Sowerby was an automotive sales representative.
On November 8, 2016, Sowerby won the election and became a Democratic member of the Michigan House of Representatives. Sowerby defeated Lisa Valerio-Nowc and Mike Saliba with 56.16% of the votes. On November 6, 2018, as an incumbent, Sowerby won the election and continued serving District 31. Sowerby defeated Lisa Valerio-Nowc by 59.89% of the votes.
Sowerby's wife is Martha. He has a son from a previous marriage.